Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f91c0c0fe3f724…

MALICIOUS

PDF

46.0 KB Created: 2020-08-07 15:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 341238442127368347c85e8849edfd28 SHA-1: 9c3e247c2b4369f6e9f7e09e42af5079af36e96b SHA-256: 11f91c0c0fe3f7249b65aebaeed53795827cedef6c0e6d9d4ff026579bd2b7c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. This indicates a phishing or scam attempt, likely using the guise of a free download to redirect users to harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=pancreas+anatomia+e+histologia+pdf In PDF document text
    • http://files.wildwoodacres.com/uploads/1/3/0/9/130969498/2421831.pdfIn PDF document text
    • http://files.hermitthrushhomestead.com/uploads/1/3/1/6/131637419/wobigapepo.pdfIn PDF document text
    • http://files.veritones.com/uploads/1/3/1/3/131398350/rogaxopopuwukixa.pdfIn PDF document text
    • http://files.pursewithpurpose.org/uploads/1/3/1/6/131637211/mopidozimisud_rozupe_wizebofepeloda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/65465073651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/lavevezogozatilufuxunok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/misaladajuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/72028018264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/english_alphabet_letters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2520/3354/files/52582328362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/53842522574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/how_to_change_to_word_on_macbook_air.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/19084502989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/25470153307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/10537086952.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 5568 bytes
SHA-256: 73b467cb8d3e1d8fe4d6a1686ca724d86659c98996a24d216238ac30e4e3f249
font_01_sfnt_off000086ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AD 10672 bytes
SHA-256: 78698eeecc265bb97886f5d9860291a59220540889fd94d553be96e3ead979c8

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